Motion-picture film strip



Get. 9, 1928. 1,687,048

- E. c. VAN DOORN MOTION PICTURE FILM STRIP Filed Aug. 23, 1926 Edward C. Vawflooriv,

I N VEN TOR.

ATTORNEYS.

j-Patentedbct. 9,1928. 1

TUNITED"STATES Plum-0H Enwsnn 0. van moan, or noczmsraa, new 1031:, assrenon- TO x'onax comm, or nocnnsrsRuN nwxonx, a coaronarrouor YORK.

' morIoN-rrcrunnm swan,

s ucaabi-measumt as, 1926. L seat is. 130,799;

c'lhis invention jrelates to" motion picture ,1 film and more particularly to such film as is furnished ill 8, cartridge for daylight loading in a camera.

v the ends thereof. 'eras'of various types, typical examples being As thus furnished,'a typical-cartrid 0 coma reel'having wound thereon a and of with protectig ipiaper band's attached to s may be used in cam shown in the patents to Tessier 1,572,252,

granted Feb. 9, 1926', and Wittel 1,588,082,

- granted June 8, 1926.

the film strip is fed in In such apparatus, a self supported loop from a feeding means, such as a sprocket, to a gate through which it isadvanced, and thence in anotherlo'pp to I a feeding-means. At the gate, the film usually f passes betweenspring pressed guide strips v or be built up on the smooth guilding surfaces,"

,portable'camera, thisjs parti '7 camera, and the increased cause havnig apertures for the exposure and for theintermittent mechanism- There is a tendency for particles of emulsiomto be scra ed fromthe sensitive layer an to thereby greatly increasin the friction between'the film and the sli eway,-and also to' ile u on the edge of the e sure window vhere it renders the edge f the image rough and uneven. In a is, a, Y s:- van us,as. esprmgs'are ma e as; t as posible to increase .theifportahility of the riction du to may become so great as practically to render the;came'ra.inoperative;

- other dificnl V sometimes encountered, is that a per protective having Y much less y than the film band,

liable in be the case where the J tect the sensitized film from moistur will readily attachable .Thepbj'ectsof my invention are to a protective band' which will maintain.

evelo a tendency tobuckle as the are gied thro theman donotmamtain.

the pported loops. is" rticuhas been subjected humid atmosphen d conditions,'ten to m ke t p 9 V cially limp. Un er .such -'condit1ons,'more-' V o e 0 7 paper atmospheric mfl en over, the protection afforded the film by the its stiflnessand resiliency at all times, williprosliding through the film gate.

The above and other objexzts by a'bandgcoinpo sed of two sheets or strips of 2 paper laminated together by a waterproofin varnish which to' some extent .ing surfaces and forms a stiffening layer be-. tween the strips. .Such a band may be coated on one surface with gelatine and on the other Fig. 2-is a designate the same partsthroughnetrates and lmpregnates the paper strips rom'their -faca perspective view of a of r 7d perspective view on an enlarged scale ofa portion of-the filmstrip including the junction of the protective portion.

Fig.3 is an edge viewof a similar fragment showing a form.

.In Figs; 2' and 3 the are exaggerated.

portion and a .era use, comprises a reel having side l 1, a core 2, up'onw 'ch' ,wound aprofiective portion 3, coiled film an 111151,... in". portion 4'at-' tached at one end to the outer. end ofthe rotective I on 3- and an outer leader ban or "Pt .i

the outer end of the coiled portion 4 and. wound around it, the protective port ons 3'a nd'5 thus J the sensitized portion 4 and .the threeipon. t1ons'3, 4 and fi oonstituting'in efiect a single, coiled film or laltlaions' 11d.ed 4 m p e portion consisl3,aais of a support 6 of apla'stic cellu'losic product,

sucha's any well known composition of cellulose ester; ether or the like, pre'ferabl cel acetate, upon onesurface-of whi is ahght sensitive gelatino-silver-halide layer "l. The leader haml t consists of two paper bands Sfadherentl laminated-toggther by-a layer of waterpro ferabl Of a type. The laminated band formed may be coated on oxiesn'r-- face with gelatine 1.0,frenderirig itfthe more layer7, and on e other surface with wax irectly on the core, 3

portion 5 attached at one end to.

forming eontinuations of e The film cartri g as furnishedfor cam-' f P Ill-Wing flusualpervarnish9,w chispre-'.

. .106 to the gelatin'e V 12: The waxedeaderstri-p, being-drawn through a camera prior'to the passage of the are attained sensitized portion, coats the slideway very up lightly with wax and matcriallyreduces the tendency of emulsion particles to be scraped off and the friction between the film and the guiding plate.

' satisf actory being the following Cellulose nitrate is desirable.

Any of the well known varnishes, particularly cellulose ester or ether varnishes may be used, a typical one that has been found 1 Parts by weight.

100 Fusel oil or butyl alcohol 50 Methyl alcohol 900-1500 Gamphor completely penetrate through the paper. It does, however, sufliciently stiffen it and protect it against the penetration of moisture to overcome the defects noted.

Care should be taken that the Paper used is not too heavy or the varnish too thick, lest the final laminated strip be stiffer than While it is desirable that the leader strip be sufficiently stifl to be self supporting in theloop under all conditions,-

it should not be so stiff as to cause excessive friction. Accordingly the paper used' for' both laminations should be thin and flexible and the varnish, which adds considerable stifi'ness,.should be rather'thin or dilute. 1

The specific form's herein disclosed are by way of example. Itv is obvious that numerous embodiments are possible, andI contemplate as within my invention all such modifications and equivalents as fall within the scope of theappended claims.

- proof adhesive. 1

Having thus described my inven'tion, what I claim as new and desire to secure by LettersPatentis:

1. A motion pictureifilm stri including a band ofsensitized material an a protective strip therefor comprising twotco-extensive paper bands laminated together by a water- 2; A motlon picture film strip including a band of material sensitized upon one surface and a 'rotective strip attached to one end thereof and forming a continuation thereof and comprising two co-extens'rve paper bands laminated together by a waterproof cellulosic adhesive, said protective having a coating of wax upon that strip 'sur ace which constitutes a continuation of the sensitive surface.

3. A motion picture film strip including a band of material having a sensitized, gelatinous coating on one surface and a protective band therefor and I comprising two co,-extensive paper bands laminated together by a waterproof cellulosic adhesive, andhaving one surface coated with gelatine, one end of the protectivehand being attached to oneend of the sensitized band by adherence of the two gelatine coatings.

4. A motionplcture filmstrip including a band of material having a' sensitized, gelatinous coating on one surface and a protective band therefor and comprising two (:0- extensive paper bands laminated together by a waterproof cellulosic adhesive, and

having one surface coated with gelatine, and

the other surface coated-with wax, one en of the protective bandbeing attached to one! end of the sensitized band by adherence of the two gelatine coatin ggs.

5. As an article of manufacture, a strip of coiled material adapted for use in a motion picture camera and including a coiled band with an unexposed sensitized layer upon one surface and a protective strip attached at one end to the outer end of said coiled band and coiled around said band and comprisin two co-extensive paper. bands laminate together by a waterproof cellulosic adhesive. i

6. As an article of manufacture, a strip of coiledmaterialadapted for use in a mo,- tion picture camera and including a 'coiled band with an unexposed, sensitized'ygelatinous layeruponone surface and" a pro.-

t'ective band attached at one" end to the outer end of the coiled band and coiled 1 around said band and comprising two 'co-j extensive paper strips laminated toge her by a waterproof cellulosic adhesive, that sur,-

face of'the protective band that constitutes I a continuation ofjthe sensitive surface having a' co'atingof wax. .As an articlefiof manufacture, a con- 'tinuous' single strip of coiled material adapted for use in a'motion picture camera and including a'coiled band comprising a cellulosi'c film support -with an unexposed, sensi-.

tijsfie, gelatinous layer upon one surface, and a '1''n'o'te'ctive-bandattachedat oneend to the outer end of said coiled band and .coiled around said band, -andcomprisiirg two co-.

extensive paper strips laminated together by a waterproof cellulosic adhesive, saidprotective-band having a gelatine layer on one surface and a coating of wax on the other surface, the two bands being attached 0 i ,geth er b" adherence ofthe latine layers.

'Signe at Rochester, New v day of Au st, 1926.

ork this 12th nwannovfl 'DoonNxf 

